| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a spatial harmonic of inductance of a motor. <P>SOLUTION: The motor controller includes: a fundamental wave current controlling circuit 100 for controlling a fundamental wave current of a three-phase AC motor M in dq axis coordinate system, made up of d axis and q axis, synchronized with rotation of the motor M; a harmonic current controlling circuit 200 for controlling a harmonic current of the motor M to 0 in dhqh axis coordinating system, made up of dh axis and qh axis, rotating at a frequency as an integral multiple of a fundamental wave factor of a current in the motor M; and a spatial harmonic wave processor 10 for calculating a spacial harmonic wave of inductance of the motor M on the basis of a current of dq axis coordinate system and a rotational speed of the motor M. <P>COPYRIGHT: (C)2004,JPO |
